480 



PROCEEDINGS OF THE ACADEMY OF 



[Sept., 



Fig. 7. — Eyes and tentacles of 

 Anciliplana graffi. 



Anoiliplana graffi op. nov. 



Several specimens of this species were collected in Monterey Bay 



and along the adjoining coast. The largest specimen is broad oval 



in outline and measures 18 mm. in length by 13 in greatest width. 



olor notes were obtained. The ventral sucker is slightly anterior 



to the middle of the body. The mouth is placed one-sixth the length 



of the animal from the anterior 

 margin. The penis is directed forward. 

 The tentacles are large, broadly tri- 

 angular outgrowths of the anterior 

 margin of the body extending pos- 

 terior to the brain. Small eyes 

 (text fig. 7) occur above the brain in 

 two imperfectly separated groups, 

 No eyes occur on or about the ten- 

 tacles. 



The pharynx (PI. XVII, fig. 35), 



more or less conical in form, leads into 



the main gut which communicates in 



turn with an average of eight pairs of 



intestinal branches. These plainly anastomose at the outset and 



probably continue to do so even to the margins of the body. 



The brain is located immediately in front of the pharyngeal pocket, 

 but other details of the nervous system have not been determined. 

 The testes are ventrally disposed, and clearly defined sperm capil- 

 laries are totally invisible in cleared specimens. The vasa deferentia 

 (PI. XVII, fig. 35) first appear opposite a point slightly behind the 

 sucker. Their many ramifications finally converge anteriorly to 

 form the large single ducts (PI. XVI, fig. 31) which bend sharply 

 backward behind the penis and curve inward to form a semicircular 

 transverse canal. From the centre of this arch a very short duct 

 pursues a direct course to the large and spherical seminal vesicle. 

 The ejaculatory duct leaves the vesicle at the opposite side and soon 

 enters* the base of the penis. The granular gland, communicating 

 with this canal at the base of the penis, is elliptical in outline and 

 lies between the penis and the seminal vesicle. 



The ovaries are dorsal and the uteri, which plainly anastomose 

 (PI. XVII, fig. 35) from the first, probably connect with the former 

 by means of a system of anastomosing capillaries. The web-like 

 uteri extend lateral to the main gut throughout the greater part of 

 its course, and posterior to the seminal vesicle converge (PI. XVI, 



